SU829887A1 - Method of underground leaching-out of minerals - Google Patents

Description

The invention relates to mining and can be used in the development of mineral deposits, for example ores of various metals.

A known method of underground leaching of minerals, including crushing the mineral with its mineralization, irrigation of the crushed mineral by leaching solutions, pumping productive solutions and intensifying the leaching process by introducing liquid explosives into the mineralized minerals and their initiation, which results in mineral crushing, as a result of which mineralization is initiated, which results in the initiation of mineral crushing, as a result of which ].

The disadvantage of this method is the high cost of the intensification of the leaching process.

A known method of underground leaching of minerals, including crushing the mineral with its mineralization and leaving the bottom of the mined block of the pillar with drilling holes drilled in it, irrigation of the crushed minerals with leaching solutions, pumping out productive solutions and intensifying the process of leaching by reducing the leaching mass with secondary leaching with secondary the concentration of the useful component in the productive solutions G2].

However, the relatively low extraction of the useful component is due to the fact that the loosening of the bulk material is not carried out over its entire volume.

The purpose of the invention is to increase the recovery of the useful component.

The goal is achieved by the fact that after the end of shopping. mineral resources in the block under the entire area of the block, they are undercut by digging trenches, the total volume of which is 1.5-2.0 times the volume of the pillar, and secondary loosening of the mineral is carried out by sectional explosive breaking of the specified pillar.

In FIG. 1 schematically shows the bottom of an underground leach block, a vertical section; in FIG. 2 is a section AA in FIG. 1; in FIG. 3 - section BB in FIG. 2.

The method is as follows.

At the base of the block pass drift (ort) 1 and outlet workings 2, which are both openings of the block workings for collecting and pumping productive solutions. From the delivery drift (orth) 1 and at one of the block boundaries. (chambers) pass a cutting uprising, into which a cutting slit is being cut 3. The base of the cutting uprising is formed under ore receiving funnels to release beaten ore from the cutting gap. The ore mass to be leached is drilled with deep wells and destroyed by blasting into a cutting slot 3. The crushed ore 4 is magnetized. After the ore is emaggregated, trench drifts (orts) are passed 5. Rod drills 6 are drilled from these drifts, which serve to form trenches 7 and drain productive solutions through the pillar 8 during the first leaching period. After the trench 7 is formed (undercharging methods for rod wells 6), trenches 9 are left above the delivery drift (orth) 1. The stained ore ore is irrigated with leaching solutions and the resulting product solutions are pumped to the surface for processing.

After a certain period of time, cracks of various kinds are filled with aggregates (clays, sand, salt deposition, etc.), and therefore the filtration properties of the leached ore and, consequently, the concentration of the useful component in productive solutions are reduced. The beaten ore 4, compacted during leaching, is repeatedly destroyed due to self-collapse 10 along the loosening zones 11 and along the boundary of the secondary loosening ellipsoid 12. To do this, ore is pulled out from the cutting slot 3 to create compensation that provides good conditions for the destruction of the drainage pillar 8. After that, using drainage wells 6 as blast holes, destroy the pillar 8 in sections, the total volume of trenches 7 is 1.5-2 times the volume of the pillar 8. The crushed ore from the pillar 8 is placed in trenches 7, after which vshayasya leached ore on the resulting 4 samoobrushaetsya space previously Catching emoe entirely. Self-collapsing, the ore is mixed, further crushed by cracks weakened during leaching, the coefficient of loosening of the leached ore increases, and its filtration properties increase. After that, the ore is again irrigated with leaching solutions.

The proposed method for the development of minerals by underground leaching with subsequent intensification of the process due to self-collapse has the following advantages: repeated drilling and blasting operations in the destroyed and stained ore are eliminated, uniform re-loosening of the stained ore, the completeness of useful component extraction increases, which corresponds to a more rational use of subsoil, reduces the time unit, increased safe working conditions.

Claims (2)

The invention relates to mining and can be used in the development of mineral deposits, such as ores of various metals. There is a known method of underground leaching of minerals, which includes crushing the mineral with its storage, irrigation of the crushed mineral and leach solutions, pumping out productive solutions and intensifying the leaching process by introducing liquid explosives into the magnetized mineral, and explosives into the minerals and into the process of leaching into the minerals that are used to inject the liquid into the minerals and the flow of the leached minerals. crushing of minerals The disadvantage of this method is the high cost of work on the intensification of pr Leaching process A method of underground leaching of minerals is known, which includes crushing minerals, storing them and leaving a pillar with a drilled hole drilled in it, irrigating the crushed minerals with leach solutions, pumping out of the solutions, and executing the process in the case. mass after reducing the concentration of the useful 1 component in the productive solutions of Gz. However, the relatively low recovery of the useful component is due to the fact that the losing of the aerated mass is not loosened in all its volume. The purpose of the invention is to increase the recovery of the useful component. The goal is achieved by the fact that after the end of the storage, it is useful for the fossil in the block under the whole block to form the intersection by penetrating the trenches, the total volume of which is 1.5-2.0 times larger than the entire volume of the entire pillar, and the secondary loosening of the mineral by sectional blasting of the specified pillar. FIG. Figure 1 shows schematically the bottom of an in-situ leach unit, a vertical section; on section A-A in FIG. one; FIG. 2 section BB in FIG. 2. in FIG. 3 The method is carried out as follows. At the base of the block, a delivery drift (ort) 1 and discharge outlets 2 are made, which are simultaneously blocking openings and for collecting and pumping productive solutions. From the delivery gate (ort) 1 and one of the boundaries of the block. (chambers) pass a cutting riser, into which a cut slit 3 is cut. The base of the cut revolver is formed under the ore receiving funnels for discharging broken ore from the cut slit. Ore massif, which is subject to leaching, is drilled with deep wells and destroyed by blasting at the cutting gap. Fragmented ore 4 is stored. After the ore has been mapped, trench drifts (orts) 5 have been made. Out of these drifts, rod wells 6 are drilled, which are used to form trenches 7 and drain the production solutions through the rear pillar 8 in the first leaching period. After the formation of (trenches and sump wells 6) trenches 7 above the delivery ram (ort) 1, the overhead shafts 9 are left. The zagged ore is irrigated with leach solutions and the resulting solutions are pumped to the surface for processing. After a certain period of time, cracks of various types of aggregates (clay, sand, salt deposition, etc.) occur, which results in a decrease in the filtration properties of the leached ore and, therefore, the concentration of the useful component in the production solutions. . The broken off ore 4 compacted during leaching is repeatedly destroyed by self-crushing 10 through loosening zones 11 and along the ellipsoid of secondary loosening 12. To do this, ore is let out of the cut-off slit 3 to create good conditions for destruction of the drain pillar 8. After that, Using drainage b wells as explosives, section by section destroy targets 8, the total volume of trenches 7 is 1.5-2 times larger than the volume of the rear sight 8. The crushed ore from the rear sight 8 is placed in the trench x 7, after which leaching the ore with the louse 4 samoobrushaets in the resulting free space formerly occupying emoe entirety. Self-crushing, the ore is mixed, additionally crushed by cracks weakened during leaching, the loosening coefficient of the leached ore increases, its filtration properties increase. After that, the ore is again irrigated with leaching solutions. The proposed method for the development of minerals by underground leaching with subsequent intensification of the process due to self-damage has the following advantages: repeated drilling and blasting operations are destroyed in the destroyed and gasified ore; safe working conditions are improved. CLAIMS A method of underground leaching of minerals comprising minerals crushing with its magazinirovaniomi executed by leaving the bottom pillar block with bored therein drainage wells, irrigation crushed mineral leaching solution pumping productive solutions and intensification process .vani leached by secondary mass after loosening zamagazinirovannoy a decrease in the concentration of the useful component in the production solutions, characterized in that then, in order to increase the extraction of the useful component, after the end of the storage of the mineral in the block under the whole block the whole area is cut by the penetration of trenches, the total volume of which is 1.5-2.0 times larger than the total volume of the mineral carried out by sectional blasting of the specified rear sight. Sources of information taken into account in the examination 1.Mosinets VN and others. The destruction of rocks. M., Nedra, 1975, p. 203-204. 2. Vakhurov V.G. and others. Underground leaching of uranium ores. M., Ltomizdat, 1969, p. 49-61. fig.}